We studied the incidence-angle dependence of the optical reflectivity difference in response to ultrathin films on transparent and opaque substrates. We found that the classical three-layer model reproduces the experimentally obtained angular dependence for a monolayer of xenon on Nb(110) and for a monolayer of protein molecules on functionalized glass. We explore the enhancement of the optical response near the Brewster angle (or its equivalent for opaque substrates) in thin film detection.
© 2006 Optical Society of America
Original Manuscript: October 3, 2005
Manuscript Accepted: November 14, 2005
Vol. 1, Iss. 3 Virtual Journal for Biomedical Optics
J. P. Landry, J. Gray, M. K. O'Toole, and X. D. Zhu, "Incidence-angle dependence of optical reflectivity difference from an ultrathin film on solid surface," Opt. Lett. 31, 531-533 (2006)